Enamel fill gives engraved metal marks clear, durable colour without turning the whole card into a generic printed surface. It is a sequence, not a print: engrave the recess, fill it with colour, cure, and level flush — which is why it excels at emblems, borders, and tier details with defined boundaries.
Navy insets on copper, thin-edge enamel detail, a colour-option trio, and dark-metal accents — fill work across the range.
Enamel fill is a sequence: the mark is engraved first so the recess forms a dam, colour is filled into it, cured, and levelled flush with the surface. That is why fill zones need engraved boundaries, and why fine, open linework fills poorly — the recess controls where colour can and cannot go.
Approve engraving geometry, fill adhesion, colour tolerance, and the finished sample's surface feel.
The practical route is selected from the system, audience, and handling context before the final metal finish and mark treatment are approved.
Metal card production should confirm body construction, finish, chip route, data handling, marking layers, and approval samples in one brief.
In sequence: the mark is engraved so the recess forms a boundary, the colour is filled into it, cured, and levelled flush with the surface. The result sits in the metal rather than on it.
Emblems, borders, tier marks, and short graphic elements with closed shapes. Fine, open linework fills poorly because the recess is what holds the colour — geometry is confirmed at proof stage.
The recess is shallow relative to the body, but like all engraving its depth and position are agreed with the shielding stack and antenna-safe area before the fill sample is approved.